Search results for "LIMIT"
showing 10 items of 2826 documents
Scarpa. Una cerniera spaziale per lo Steri
2018
Per un architetto pensare alla propria città, e un luogo specifico al suo interno, migliorarlo significa concentrarsi sulle qualità specifiche del sito da un punto di vista storico, economico, sociale e culturale. Questo scritto entrerà nei dettagli di questa riflessione, attraverso le esperienze di Carlo Scarpa e l'importante ruolo da lui assunto nella definizione dello Steri (1972-1978). Tutto ciò è diretto all'acquisizione della capacità di riconoscere la fisicità di un'architettura significativa e delle relazioni spaziali che la definiscono, come ad esempio quelle tra interno ed esterno, rendendo così il proprio concetto di soglia e di continuum spaziale. Siamo consapevoli che le scelte…
Semplicità formale: l’architettura è il luogo
2016
Santo Giunta, Emanuele Walter Angelico, Alessandro Camiz, Giuseppe De Giovanni, Silvia Covarino, Santo Giunta, Mariagrazia Leonardi, Giovanni Andrea Paggiolu, Emma Tagliacollo come coordinatori del laboratorio Risanamento e Riuso, che investe anche i temi della conservazione e della rifunzionalizzazione del costruito dismesso, abbandonato o degradato anche nell’edizione del 2015, ‘Città in Trasformazione’, hanno contribuito ad arricchire il dibattito e la conoscenza. I vari incontri di Laboratorio hanno visto il coinvolgimento di studiosi, di progettisti e specialmente di allievi delle varie sedi italiane e straniere in un confronto costruttivo scaturito dalle proposte progettuali presentat…
Contro-natura, astrazione, limite
2019
Una riflessione teorica sul ruolo del contro-natura, dell'astrazione e del limite nell'architettura di Paulo Mendes da Rocha.
Tra Limes e Limen
2014
Between “limes” and “limen” Analyzing the gathered projects, there is a common result, characterized by the Latin words “limes” and “limen”. The two words explain the way the projects, giving shape to the interection between town and countryside, establish a condition of limit or threshold. 01. The agricultural Gugliotta park at piano Tavola, Carini At Carini, for the first area of the project there are two different attitudes. The groups Cacciatore, Farina, Prandi and Moduloquattro analyze via Rocco Chinnici as main element of their intervention, while the groups Elmo and Trisciuglio designed installations where this axis is diluted or denied. 02. The margin of the agricultural park of str…
On MR Differential with Limited Slip
2014
Design of a magnetorheological (MR) sports car differential is presented in this paper, with the aim of the total mass reduction and the torque maintenance. The torque output is controlled by adjusting the applied magnetic field. The nominal output torque of the differential is derived by using Bingham plastic constitutive model; the choice of the materials occurs to minimize the thickness of the circuit, but preliminary sizing based on electromagnetic theory does not lead to satisfactory results. Electromagnetic finite element analysis (FEA) is performed to estimate the effective distribution of the magnetic field. The shear stress distribution in MR Fluid is theoretically predicted using …
New considerations for modelling a MED-TVC plant under dynamic conditions
2019
Abstract The multiple-effect distillation (MED) technology is nowadays the most promising desalination process to be coupled with variable heat sources, thus leading to a more sustainable way to produce water. In order to prove the potential of this, it is of major interest to develop powerful modelling tools to predict the performance of this coupling. Only a few models have been presented so far. They show promising results but were based on some simplifying assumptions and non-physical constraints that could limit the analysis of the dynamic behaviour of a MED plant. This paper presents new considerations for the dynamic modelling of a MED plant associated with a thermal vapour compressi…
Experiments and modelling for determining the Limiting Current Density in Electrodialysis units
2018
In the present work, in order to explore such issues on the LCD identification, we performed in-situ measurements with ED units, assessing the influence of operating conditions and validating a purposely implemented process simulator, which was then used for further investigation
Effect of membrane profiles on the limiting current density in electrodialysis
2019
In the present work, we experimenrtally investigated the effect of different membrane profiles on the LCD, testing also different operating conditions.
Limiting current phenomena in electro-membrane processes: local occurrence or stack-dependent one?
2021
Background Electro-membrane processes are gaining great interest in the field of desalination and brine valorisation. However, limiting current phenomena can be a bottleneck for their techno-economic performances. In the present work, the in-out distribution of current density is measured to elucidate the achievement of limiting conditions in real stacks. Materials and Methods A 10-cell pairs Electrodialysis stack (10×40 cm2 active area), equipped with four-segmented electrodes, was tested. NaCl solutions at an inlet concentration ranging from 0.5 to 60 g/l were fed at velocities of either 2 or 4 cm/s in parallel flow. Current density-voltage curves were built by applying equal increasing s…
Numerical simulation of electroconvection phenomena in electrodialysis
In water desalination by electrodialysis, the current density i cannot exceed specific constraints, notably the diffusion limit. Working at higher i (overlimiting current regime) would make higher desalination rates possible. The main phenomenon allowing overlimiting current densities is the electrokinetic instability that arises when a sufficiently intense electric potential gradient is imposed, and leads to electroconvective mixing in the near-wall layer. In this study, these phenomena were investigated by CFD. The governing equations were the Nernst-Planck transport equations for anions and cations, the Poisson equation for the electrical potential and the Navier-Stokes and continuity eq…